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What is STL?
STL is known as Standard Template Library, it is a library that provides 4 components like container, algorithms, and iterators.
STL is known as Standard Template Library, it is a library that provides 4 components like container, algorithms, and iterators.
See lessCan you compile a program without the main function?
Yes, it is absolutely possible to compile a program without a main().
Yes, it is absolutely possible to compile a program without a main().
See lessWhat are the C++ access modifiers?
The access restriction specified to the class members( whether it is member function or data member) is known as access modifiers/specifiers. Access Modifiers are of 3 types: Private – It can neither be accessed nor be viewed from outside the class Protected – It can be accessed if and only if the aRead more
The access restriction specified to the class members( whether it is member function or data member) is known as access modifiers/specifiers.
Access Modifiers are of 3 types:
Private – It can neither be accessed nor be viewed from outside the class
See lessProtected – It can be accessed if and only if the accessor is the derived class
Public – It can be accessed or be viewed from outside the class
What does the Scope Resolution operator do?
A scope resolution operator is denoted by a ‘::‘ symbol. Just like its name this operator resolves the barrier of scope in a program. A scope resolution operator is used to reference a member function or a global variable out of their scope furthermore to which it can also access the concealed variaRead more
A scope resolution operator is denoted by a ‘::‘ symbol. Just like its name this operator resolves the barrier of scope in a program. A scope resolution operator is used to reference a member function or a global variable out of their scope furthermore to which it can also access the concealed variable or function in a program.
Scope Resolution is used for numerous amounts of tasks:
To access a global variable when there is a local variable with the same name
See lessTo define the function outside the class
In case of multiple inheritances
For namespace
Is destructor overloading possible? If yes then explain and if no then why?
The simple answer is NO we cannot overload a destructor. It is mandatory to only destructor per class in C++. Also to mention, Destructor neither take arguments nor they have a parameter that might help to overload.
The simple answer is NO we cannot overload a destructor. It is mandatory to only destructor per class in C++. Also to mention, Destructor neither take arguments nor they have a parameter that might help to overload.
See lessWhat is a virtual destructor?
When destroying instances or objects of a derived class using a base class pointer object, a virtual destructor is invoked to free up memory space allocated by the derived class object or instance. Virtual destructor guarantees that first the derived class’ destructor is called. Then the base class’Read more
When destroying instances or objects of a derived class using a base class pointer object, a virtual destructor is invoked to free up memory space allocated by the derived class object or instance.
Virtual destructor guarantees that first the derived class’ destructor is called. Then the base class’s destructor is called to release the space occupied by both destructors in the inheritance class which saves us from the memory leak. It is advised to make your destructor virtual whenever your class is polymorphic.
See lessWhat are destructors in C++?
Destructors are members of functions in a class that delete an object when an object of the class goes out of scope. Destructors have the same name as the class preceded by a tilde (~) sign. Also, destructors follow a down-to-top approach, unlike constructors which follow a top-to-down.
Destructors are members of functions in a class that delete an object when an object of the class goes out of scope. Destructors have the same name as the class preceded by a tilde (~) sign. Also, destructors follow a down-to-top approach, unlike constructors which follow a top-to-down.
See lessExplain the constructor in C++.
A constructor is a special type of member function of a class, whose name is the same as that of the class by whom it is invoked and initializes value to the object of a class. There are 3 types of constructors: A. Default constructor: It is the most basic type of constructor which accepts no argumeRead more
A constructor is a special type of member function of a class, whose name is the same as that of the class by whom it is invoked and initializes value to the object of a class.
There are 3 types of constructors:
A. Default constructor: It is the most basic type of constructor which accepts no arguments or parameters. Even if it is not called the compiler calls it automatically when an object is created.
B. Parameterized constructor: It is a type of constructor which accepts arguments or parameters. It has to be called explicitly by passing values in the arguments as these arguments help initialize an object when it is created. It also has the same name as that of the class.
C. Copy Constructor: A copy constructor is a member function that initializes an object using another object of the same class. Also, the Copy constructor takes a reference to an object of the same class as an argument.
See lessWhen should we use multiple inheritance?
Multiple inheritances mean that a derived class can inherit two or more base/parent classes. It is useful when a derived class needs to combine numerous attributes/contracts and inherit some, or all, of the implementation from these attributes/contracts. To take a real-life example consider your ParRead more
Multiple inheritances mean that a derived class can inherit two or more base/parent classes. It is useful when a derived class needs to combine numerous attributes/contracts and inherit some, or all, of the implementation from these attributes/contracts. To take a real-life example consider your Parents where Parent A is your DAD Parent B is your MOM and Chid C is you.
See lessExplain inheritance
The capability or ability of a class to derive properties and characteristics from another class is known as inheritance. In simple terms, it is a system or technique of reusing and extending existing classes without modifying them.
The capability or ability of a class to derive properties and characteristics from another class is known as inheritance. In simple terms, it is a system or technique of reusing and extending existing classes without modifying them.
See less